Hello,
[(Face Value/PresentValue)^1/Time Period]-1
=[(1000/1200)^0.1]-1
= 1.81%
this is different from the example where it is calculated as 8.02%

and the same issue with the second formula:
P = (C / 2) x {(1 - (1 + YTC / 2) ^ -2t) / (YTC / 2)} + (CP / (1 + YTC / 2) ^ 2t)
=(1090/2)*((1-(1+YTC/2)^-10)/(YTC /2))+(1200/(1+YTC/2)^10)
= 529121.28% I tried with 0.076 but getting something strange!!!
this is different from the example where it is calculated as 7.6%

Thanks,
Dom